Clamp for trolley conductors



b- 1930- P. G. swARs ET AL 1,745,876

CLAMP FOR TROLLEY CONDUCTQRS I Filed Oct. 22, 1926 WITNESSES: INVENTORS Howard/V Bchards.

ATTORNEY T Patented :Feb. 4; 1930 1 U ITED "STATES.

PATENT erries PAUL G. .SWARS AND HOWARD N. RICHARDS, OF PITTSBURGH, PENNSYLVANIA, AS- SIGNORS TO WESTINGHOUSE ELECTRIC ANDMAE-TUFACTURING COMPANY, A COR- l HIPORATION or PENNSYLVANIA oLAMP'Fon TaoLLnY connuc'rozas Application filed'October 22, 1926. Serial No. 143,370.

, Our invention, relates to means for suspendlng trolley-conductors from overhead structures and particularly to clamps for v gripping and holding trolley-conductors.

" One of the objects of our invention is to provide an improved device of the character I specified which shall be simple, durable and cheap inconstruction and effective and efficient in operation.

:nother object of ourinvention is to pro- *vide a clamping device having interchangeable parts,

In .a mine orin any other place having a low roof or ce1l1ng,'1t is desirable to support the trolleyrcon'ductor as near theroof as possibl'e, and it is afurther object of our inven tion to provide aclamp that will occupy a fminimum amountof space between the roof,

I or ceiling and the trolley-conductor.

, I eral," two interchangeable jaw members, which are fastened together by means of pinsv Our improved device comprises, in genextending through, cooperating apertured Q lugs near'each end and which areheld in 1 stem'having an enlarged head on its lower operative position by means of a supporting end which is adapted to fit in a recess that is located in the central portion of the jawbetween the inner ends of the pins that hold the jaws together.

Inthe accompanying drawings, Figure 1 is a view, in side elevation, of a trolleyconductor clamp embodying our invention; j Fig. 2 is a view, in section, taken on the line IIII of Fig. 1; v

Fig. 3is aview, in section, taken on the f line 111 111 of Fig.1; and I Fig. 4 is'a view, in side elevation, of the inner sideof one of the clamping jaws of the trolley conductor clamp shown in Figs. 1,

Referring to the-drawings, our improved trolley-conductor clamp comprises a pair of clamping jaws 1 and 2, which are provided with a pair of lips 3'and 4 that are adapted to grip a trolley-conductor 5 and have two 'groups-ofcooperating apertured lugs 6 on their inner sides that are adapted to be hinged together by means of aline'd pins 7.

In order that the clamping jawsmay be interchangeable, each is provided with one lug near one end and with two lugs near its other end, so that, when two jaws are placed in operative position, the lug on one end of one jaw will fit between the two lugs on one. end of the cooperating jaw.

The clamping jaws are provided also with central complementary recesses 8 and 9 which are adapted to receive an enlarged head 10 that is formed on the lower end of a supporting stem 11. The supporting stem'll has a screw-threaded socket 12 in its upper end by means of which it may be easily secured to a supporting stud (not shown).

The upper portion of the supporting stem 11 is also screw-threaded externally and is adapted to receive thereon a screw-threaded compression nut 13 which is provided with an enlarged portion 14 on its lower end that is adapted to bear against extended 1ips.15

and 16 on the upper portions of the clamping jaws land 2. V g

assembling theclamp, the compression nut 13 is first screwed upon the supporting stem 11, and thenthe clamping jaws 1 and 2 are placed in position so that the'c'omplementary recesses 8 and 9 receive the enlarged head 10 of the supportingstem 11.

One of the pins 7 is then driven through each group of the apertured lugs 6 and is peened or otherwise secured in position.

In erecting the clamp in operative position, the compression nut 18 is screwed downwardly on the supporting stem 11 until the parts of the clamp are locked together,.so that the clamp may be screwed upon a supporting stud. The compression nut 13 is next screwed upwardly until the lips 3 and 4 of the jaws may be opened sufficiently to receive the trolley-conductor 5. After the trolley-conductor is laced in osition the com ression nut We claim as our invention: 7 1. A clamp for supportingitrolley conductors comprising, in'combination, a plurality 'of coacting jaws provided with a groove to receive a trolley conductor, intermeshing lugs provided on the aws,'sa1d lugs havlng openings disposed to be aligned, pins for engaging the openings to hinge the jaws, a supporting stem for the jaws, a head, provided on the stem, said jaws having a recess for receivingthe head, the lugs and pins being 7 disposed near the ends-of the jaws to'permit the locating of the recess near the groove in i the jaws to give a small overall dimension,

the ends of the'jaws to provide a'central open- 7 said stem and head extending between the ins andserving to retain them in position, and means mounted on the stem for actuat-' ing the jaws;

2. A clamp for supporting trolleyconductors comprising in combination, a pair of coactin'g jaw membersprovided with lips for engaging a trolley conductor, said jaws being providedwith apertured lug members disposed to interfit in hinged relation, pins disposed to extend through the apertured lug members to provide ahinge connection at each end of the jaws, a supporting stem for the jaws, said stem "being provided with a head disposed to be pivotally engaged'by thej aws, saidhinge connectionsbeing disposed near ing for receiving the stem and head to'permit the locating of the socketconnection between the supporting stem and the jaws'near the lipsiof the jaws to give a small'overall dimension, projections provided on the head to limit the rotation of the stem relative to the 1 jaws, and a nut movably mounted on the stem "for actuatin the'aws to a clam in -osition.

Int'estimony whereof, we have hereunto subscribed our names this20th day of Octo- PAUL G. SVVARS. v HOWARD RICHARDS; 

